Uploaded January 2022 | Updated September 2026, 1 week ago

---

Guardian Angel Slime is a very burst-heavy boss, and Zero gets its name from having zero burst. This made me too scared to attempt this boss for a while, but it turns out I had more than enough damage, even with how horribly I played.

Guardian Angel Slime is a "minigame" boss that alternates between two phases. In the first phase, you try to slingshot the magma slimes into the colored doors; three magma slimes are required to block a door. Then in the second phase, a wave of slime falls downwards. You gain the ability to place blue "walls" to control where the wave flows, and need to try to get the wave into the same color door that you blocked. Rarely, there's a special golden wave that reverses the rules, and you need to get it into an unblocked gate instead. If you succeed in the second phase, you get ten free seconds of attacking the boss with bonus damage, without getting attacked back.